For new clients I usually start FI by rolling their head and supporting their shoulders. I usually explain everything I do and notice. Recently I started such an FI and commented “you wouldn’t believe how many different variations of clavicles there are”. My new client was very much amazed by this comment, and said “I didn’t know that there are differences at all!”
You might also find this interesting. Therefore I decided to post a couple of images I found on the internet:
This one I found on a bodybuilding forum. The poster did not give any credit, therefore it’s hard to say who drew it.
This is taken from the Journal of Orthopeadic Surgery and Research. Morphological clavicle groups. Mean shapes of the five morphological groups of clavicles. Daruwalla et al. Journal of Orthopaedic Surgery and Research 2010 5:21
This one I found at the open access biomedical image search archive. It says: Examples of clavicle fixation plates. 70.5 percent of variation between measurements is due to differences in width and thickness at the midpoint as well as length, rather than shape. A further 6.7 percent of variation is caused by differences in the lateral depth and angle dimensions and a subsequent 5.0 percent is due to differences in the medial depth and angle dimensions. Finally, a further 4.2 percent of variation is attributed to the change in width and thickness. These four modes attribute to almost 87 percent of clavicular variation.